A bacterium has been discovered that can substitute arsenic for phosphorus in fundamental life chemistry.
最近发现的一种细菌可以用砷替代磷作为生命组成的基本元素。
But it might be time to update that list. Because scientists have found a bacterium that can do without phosphorus-live on arsenic instead.
但也许是时候更新这份必需元素目录了，因为科学家们发现一种细菌会用砷来代替磷，不需要磷也可生存。
A bacterium has been discovered that can substitute arsenic for phosphorus in fundamental life chemistry. Christopher Intagliata reports.
最近发现的一种细菌可以用砷替代磷作为生命组成的基本元素。
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